diff --git a/configure.ac b/configure.ac
index 6ca60d3..30ad035 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,4 +1,4 @@
-AC_INIT([sbsigntool], [0.3], [jeremy.kerr@canonical.com])
+AC_INIT([sbsigntool], [0.4], [jeremy.kerr@canonical.com])
 
 AM_INIT_AUTOMAKE()